1 23 New Forests International Journal on the Biology, Biotechnology, and Management of Afforestation and Reforestation ISSN 0169-4286 New Forests DOI 10.1007/s11056-013-9376-6 Productivity, pest tolerance and carbon sequestration of Khaya grandifoliola in the dry semi-deciduous forest of Ghana: a comparison in pure stands and mixed stands E. Opuni-Frimpong, S. M. Opoku, A. J. Storer, A. J. Burton & D. Yeboah